I have said K-Mag, and a 26.5" draw. I use a 2013 cut to 27.5 or 28" and 125 to 175 grain heads.
A 2016 may be good for you too, cut to the same length and using 150+ grain heads.
Carbon Express Heritage 90 works, too.
Ash shafts (real heavy!) spined 45-50 are powerful hitters.
Shaft weights (fletched with 4.5" feathers and without points) are;
2013 288 grains
2016 346 grains
CE H.90 304 grains
Ash 419 grains (Plus 125 grain head for
total weight of 544 grains)
A 50 pound bow at our draw is giving us around 45 pounds of pull. Any head that you settle on will give you over 9 gpp, and that ash shaft is 12 gpp.
Killdeer